What do you want this combination to do? It is possible to add it as a configurable short cut key combination.
Isn't it necessary for a moderator to jump in at this point and remind the OP that he can't make a suggestion without registering the suggestion elsewhere, and a couple of people will thank the moderator for correcting the dumb user who posted here without going thru the official procedure? That's what happened when I posted my suggestion in Brainstorm about a week ago.